I'd recommend you come here. Kite some, and then figure out what you want. Depends on where you kite and what kind of riding you like to do. If you kite waddell, you should invest in a 6 or 7, if you like Alameda, buy the 13, if you're at 3rd a lot, buy a 10.

9 and 12 is fine for now tho. until you get a feel for the options around here.